mdbx-windows: use _snprintf() and _vsnprintf() to avoid dependency from CRT.

8 of 17 for https://github.com/leo-yuriev/libmdbx/issues/43

Change-Id: I335a12344b0f0d63462ac4195fafdb60f981f182

src/osal.h

@@ -94,6 +94,8 @@ static inline void *mdbx_realloc(void *ptr, size_t bytes) {
   return LocalReAlloc(ptr, bytes, LMEM_MOVEABLE);
 }
 #define mdbx_free LocalFree
+#define snprintf _snprintf   /* ntdll */
+#define vsnprintf _vsnprintf /* ntdll */
 #else
 #include <pthread.h>
 #include <signal.h>
@@ -401,20 +403,6 @@ __printf_args(2, 3) int mdbx_asprintf(char **strp, const char *fmt, ...);
 int mdbx_vasprintf(char **strp, const char *fmt, va_list ap);
 #endif
 
-#ifdef _MSC_VER
-
-#ifndef snprintf
-#define snprintf(buffer, buffer_size, format, ...)                             \
-  _snprintf_s(buffer, buffer_size, _TRUNCATE, format, __VA_ARGS__)
-#endif /* snprintf */
-
-#ifndef vsnprintf
-#define vsnprintf(buffer, buffer_size, format, args)                           \
-  _vsnprintf_s(buffer, buffer_size, _TRUNCATE, format, args)
-#endif /* vsnprintf */
-
-#endif /* _MSC_VER */
-
 /*----------------------------------------------------------------------------*/
 /* OS abstraction layer stuff */